Drawing schematics on a computer?

[Alan Douglas]

Back in the days of 286s and 386s I borrowed a program "Tango Schematic" from a friend at work, and since I was doing all their pc layout (though on a light table with tape) I had the time to learn it, and to create a set of symbols for antique components. It was cumbersome but once you got used to the steps you could work pretty fast. I used it to draw the schematics in my test-equipment book.

However Tango turned out to rely on fonts built into video cards of the time, and simply wouldn't work on newer computers.